Gallium is a soft, silvery blue metal at standard temperature and pressure. In addition, it has a low melting point of 85.57 F (29.76 C) -- less than 10 degrees above room temperature -- so if you were to pick up a lump of gallium, it would literally melt from the warmth of your hand. Then if you set it back down, it would solidify again.

One of the rarest naturally occurring metals on Earth, Rhodium is highly sought after for use in jewelry and catalytic converters. As of 2020, it was trading at $6,300.00 per ounce.

In 1911 superconductivity was first observed in mercury by Dutch physicist Heike Kamerlingh Onnes of Leiden University. When he cooled it to the temperature of liquid helium, 4 degrees Kelvin (-452F, -269C), its resistance suddenly disappeared.

Reusable pills made from metallic antimony were a popular remedy in Medieval times as a method to purge "bad humors" from the body. In fact, the practice persisted into the 18th century and may have been responsible for Mozart's death. When the composer came down with a mysterious illness, he was treated with antimony tartrate and died within two weeks. Such compounds are now known to be toxic and may produce effects similar to arsenic poisoning.

Gallium droplets beat like tiny hearts when activated by electricity and could one day be used to power robot muscles.

Three states of matter are represented by halogens at room temperature and one atmosphere pressure: fluorine and chlorine are gases, bromine is a liquid, and iodine and astatine are solids.

Because of its low density and atomic mass, beryllium is relatively transparent to X-rays, making it profoundly useful in radiation windows and particle detectors.

The most stable known isotope, darmstadtium-281, has a half-life of approximately 12.7 seconds.

Mercury, commonly known as quicksilver, is used in thermometers, barometers, manometers, sphygmomanometers, float valves, mercury switches, fluorescent lamps and other devices.

Feynman once predicted that number 137 defines the table's outer limit, as it would require electrons to orbit at the speed of light. But modern physicists have questioned this assessment, suggesting the outer limit may be 173 or even higher.